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-m+20+11m=-15+3m
We move all terms to the left:
-m+20+11m-(-15+3m)=0
We add all the numbers together, and all the variables
-m+11m-(3m-15)+20=0
We add all the numbers together, and all the variables
10m-(3m-15)+20=0
We get rid of parentheses
10m-3m+15+20=0
We add all the numbers together, and all the variables
7m+35=0
We move all terms containing m to the left, all other terms to the right
7m=-35
m=-35/7
m=-5
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